<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Login</title>
</head>
<body>
<h2>Login</h2>

<form action="/check_login" method="post">
    <div><label>username：<input type="text" name="username"></label></div>
    <div><label>password：<input type="password" name="password"></label></div>
    <div><input type="submit"></div>
</form>
</body>
</html>